/*
 * JBoss, Home of Professional Open Source
 * Copyright 2011, Red Hat, Inc. and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.mobicents.protocols.ss7.cap.service.circuitSwitchedCall;

import java.io.IOException;

import org.mobicents.protocols.asn.AsnException;
import org.mobicents.protocols.asn.AsnInputStream;
import org.mobicents.protocols.asn.AsnOutputStream;
import org.mobicents.protocols.asn.Tag;
import org.mobicents.protocols.ss7.cap.api.CAPException;
import org.mobicents.protocols.ss7.cap.api.CAPMessageType;
import org.mobicents.protocols.ss7.cap.api.CAPOperationCode;
import org.mobicents.protocols.ss7.cap.api.CAPParsingComponentException;
import org.mobicents.protocols.ss7.cap.api.CAPParsingComponentExceptionReason;
import org.mobicents.protocols.ss7.cap.api.isup.Digits;
import org.mobicents.protocols.ss7.cap.api.primitives.CAPExtensions;
import org.mobicents.protocols.ss7.cap.api.service.circuitSwitchedCall.AssistRequestInstructionsRequest;
import org.mobicents.protocols.ss7.cap.api.service.circuitSwitchedCall.primitive.IPSSPCapabilities;
import org.mobicents.protocols.ss7.cap.isup.DigitsImpl;
import org.mobicents.protocols.ss7.cap.primitives.CAPExtensionsImpl;
import org.mobicents.protocols.ss7.cap.service.circuitSwitchedCall.primitive.IPSSPCapabilitiesImpl;

/**
 * 
 * @author sergey vetyutnev
 * 
 */
public class AssistRequestInstructionsRequestImpl extends CircuitSwitchedCallMessageImpl implements AssistRequestInstructionsRequest {

	public static final int _ID_correlationID = 0;
	public static final int _ID_iPSSPCapabilities = 2;
	public static final int _ID_extensions = 3;

	public static final String _PrimitiveName = "AssistRequestInstructionsRequestIndication";

	private Digits correlationID;
	private IPSSPCapabilities iPSSPCapabilities;
	private CAPExtensions extensions;	

	
	public AssistRequestInstructionsRequestImpl(){
	}

	public AssistRequestInstructionsRequestImpl(Digits correlationID, IPSSPCapabilities ipSSPCapabilities, CAPExtensions extensions) {
		this.correlationID = correlationID;
		this.iPSSPCapabilities = ipSSPCapabilities;
		this.extensions = extensions;
	}	

	@Override
	public CAPMessageType getMessageType() {
		return CAPMessageType.assistRequestInstructions_Request;
	}

	@Override
	public int getOperationCode() {
		return CAPOperationCode.assistRequestInstructions;
	}

	@Override
	public Digits getCorrelationID() {
		return correlationID;
	}

	@Override
	public IPSSPCapabilities getIPSSPCapabilities() {
		return iPSSPCapabilities;
	}

	@Override
	public CAPExtensions getExtensions() {
		return extensions;
	}
	
	@Override
	public int getTag() throws CAPException {
		return Tag.SEQUENCE;
	}

	@Override
	public int getTagClass() {
		return Tag.CLASS_UNIVERSAL;
	}

	@Override
	public boolean getIsPrimitive() {
		return false;
	}

	@Override
	public void decodeAll(AsnInputStream ansIS) throws CAPParsingComponentException {

		try {
			int length = ansIS.readLength();
			this._decode(ansIS, length);
		} catch (IOException e) {
			throw new CAPParsingComponentException("IOException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
					CAPParsingComponentExceptionReason.MistypedParameter);
		} catch (AsnException e) {
			throw new CAPParsingComponentException("AsnException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
					CAPParsingComponentExceptionReason.MistypedParameter);
		}
	}

	@Override
	public void decodeData(AsnInputStream ansIS, int length) throws CAPParsingComponentException {

		try {
			this._decode(ansIS, length);
		} catch (IOException e) {
			throw new CAPParsingComponentException("IOException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
					CAPParsingComponentExceptionReason.MistypedParameter);
		} catch (AsnException e) {
			throw new CAPParsingComponentException("AsnException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
					CAPParsingComponentExceptionReason.MistypedParameter);
		}
	}

	private void _decode(AsnInputStream ansIS, int length) throws CAPParsingComponentException, IOException, AsnException {

		this.correlationID = null;
		this.iPSSPCapabilities = null;
		this.extensions = null;

		AsnInputStream ais = ansIS.readSequenceStreamData(length);
		while (true) {
			if (ais.available() == 0)
				break;

			int tag = ais.readTag();

			if (ais.getTagClass() == Tag.CLASS_CONTEXT_SPECIFIC) {
				switch (tag) {
				case _ID_correlationID:
					this.correlationID = new DigitsImpl();
					((DigitsImpl) this.correlationID).decodeAll(ais);
					this.correlationID.setIsGenericNumber();
					break;
				case _ID_iPSSPCapabilities:
					this.iPSSPCapabilities = new IPSSPCapabilitiesImpl();
					((IPSSPCapabilitiesImpl) this.iPSSPCapabilities).decodeAll(ais);
					break;
				case _ID_extensions:
					this.extensions = new CAPExtensionsImpl();
					((CAPExtensionsImpl) this.extensions).decodeAll(ais);
					break;

				default:
					ais.advanceElement();
					break;
				}
			} else {
				ais.advanceElement();
			}
		}

		if (this.correlationID == null || this.iPSSPCapabilities == null)
			throw new CAPParsingComponentException("Error while decoding " + _PrimitiveName
					+ ": parameters correlationID and iPSSPCapabilities are mandatory but not found", CAPParsingComponentExceptionReason.MistypedParameter);
	}

	@Override
	public void encodeAll(AsnOutputStream asnOs) throws CAPException {
		this.encodeAll(asnOs, this.getTagClass(), this.getTag());
	}

	@Override
	public void encodeAll(AsnOutputStream asnOs, int tagClass, int tag) throws CAPException {

		try {
			asnOs.writeTag(tagClass, this.getIsPrimitive(), tag);
			int pos = asnOs.StartContentDefiniteLength();
			this.encodeData(asnOs);
			asnOs.FinalizeContent(pos);
		} catch (AsnException e) {
			throw new CAPException("AsnException when encoding " + _PrimitiveName + ": " + e.getMessage(), e);
		}
	}

	@Override
	public void encodeData(AsnOutputStream aos) throws CAPException {

		if (this.correlationID == null || this.iPSSPCapabilities == null)
			throw new CAPException("Error while encoding " + _PrimitiveName + ": correlationID and iPSSPCapabilities must not be null");

		((DigitsImpl) this.correlationID).encodeAll(aos, Tag.CLASS_CONTEXT_SPECIFIC, _ID_correlationID);
		((IPSSPCapabilitiesImpl) this.iPSSPCapabilities).encodeAll(aos, Tag.CLASS_CONTEXT_SPECIFIC, _ID_iPSSPCapabilities);

		if (this.extensions != null)
			((CAPExtensionsImpl) this.extensions).encodeAll(aos, Tag.CLASS_CONTEXT_SPECIFIC, _ID_extensions);
	}

	@Override
	public String toString() {

		StringBuilder sb = new StringBuilder();
		sb.append(_PrimitiveName);
		sb.append(" [");

		if (this.correlationID != null) {
			sb.append("correlationID=");
			sb.append(correlationID.toString());
		}
		if (this.iPSSPCapabilities != null) {
			sb.append(", iPSSPCapabilities=");
			sb.append(iPSSPCapabilities.toString());
		}
		if (this.extensions != null) {
			sb.append(", extensions=");
			sb.append(extensions.toString());
		}

		sb.append("]");

		return sb.toString();
	}
}
